The newsreader found out his cancer had spread to his lungs earlier this year.
BBC Newsreader George Alagiah Reveals Cancer Has Spread To His Lungs Weeks After Recovering From Coronavirus
The BBC newsreader was first diagnosed with bowel cancer in 2014.
The BBC News presenter revealed during an appearance on News At Six that he'd tested positive for Covid-19.
The journalist was diagnosed with an advanced form of the disease in 2014, and it returned last year.
The 63-year-old BBC broadcaster will remain on television as much as possible.
Toilet stigma is a real issue for people with invisible illnesses – in some cases it's stopping them from leaving the house.
He says his cancer is now "in a holding pattern".
He found out his cancer had returned just before Christmas.
The journalist said it had been 'tough dealing with the disappointment'.